Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-17-2013, 09:42 PM
Danman's Avatar
Registered User
 
Join Date: Aug 2013
Location: Oklahoma
Posts: 78
Prechamber fuel leak possible?

I don't mean from injector halves or return lines leaking down into the gap but rather fuel coming up from between the prechamber and injector. I don't understand how a fuel leak here is possible so could someone explain it to me? Thanks

__________________
1984 300D w/ 285k mi. daily driver
1994 7.3 idi non-turbo 180k mi.
Reply With Quote
  #2  
Old 11-17-2013, 09:47 PM
Registered User
 
Join Date: Jul 2008
Posts: 3,740
Its not....if there is fuel in that area.....you have a leak from the hard line, return line or the injector half......a leak from the prechamber would be in the forum of a gas....you would lose compression.....if you put some soap or oil at the prechamber collar....you would see little bubble...
__________________
Reply With Quote
  #3  
Old 11-17-2013, 09:50 PM
Danman's Avatar
Registered User
 
Join Date: Aug 2013
Location: Oklahoma
Posts: 78
That's what I figured. I was just wondering since there is a well known website out there that sells a prechamber collar nut tool as a way to "fix prechamber fuel leaks."
__________________
1984 300D w/ 285k mi. daily driver
1994 7.3 idi non-turbo 180k mi.
Reply With Quote
  #4  
Old 11-17-2013, 09:55 PM
Registered User
 
Join Date: Jul 2008
Posts: 3,740
Hmm I bought one of them a long time back, because breaking the injectors lose....the po loosened the pre chamber resulting in a compression leak....once we tightened it down....all was good....I would think they are using that as a marketing ploy....as I can't see how you would get a fuel leak from the prechamber...
__________________
Reply With Quote
  #5  
Old 11-17-2013, 10:55 PM
Danman's Avatar
Registered User
 
Join Date: Aug 2013
Location: Oklahoma
Posts: 78
Were there any symptoms of the prechamber compression leak, other than air bubbles in fuel or oil?
__________________
1984 300D w/ 285k mi. daily driver
1994 7.3 idi non-turbo 180k mi.
Reply With Quote
  #6  
Old 11-17-2013, 11:42 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 36,010
If Fuel and Oil seep down between the Threads and into the space that is under there the shock of the vibration of the Fuel being injected and the Combustion cause little bubbles.

If you keep spraying that area with Brake Cleaner diluting what is down there and sopping it up and spraying eventually you will sop up and dilute enough that it will dry up or the level will be so low it won't bubble.

If you have a real compression leak from the Heat Shield or the Pre-chamber what comes out has more volume and velocity to it.

However, you missed one. If the Injector Nut develops a hairline crack it will indeed leak Fuel down in that area below the prechamber Ring.

__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:07 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page